Abstract: A method of controlling an encoding (bit) rate and a method of transmitting video data, and an encoding (bit) rate controller for a video encoder and a video data transmission system employing the methods, wherein the number of bits is allocated to a current picture on the basis of previous encoding results without defining a relation between an encoding rate and the distortion, the limited number of bits is not forced when features of the current picture are different from those of the previous pictures, and a quantizer scale is set adaptively to various features of the current picture without using an additional number of bits corresponding to variation of the quantizer scale, so that it is possible to improve the picture quality of video data to be displayed on a monitor by using such real time variable bit-rate control.

Abstract: An adaptive quantization controller and methods thereof are provided. In an example method, motion prediction may be performed on at least one frame included in an input frame based on a reference frame. A prediction error may be generated as a difference value between the input frame and the reference frame. An activity value may be computed based on a received macroblock, the received macroblock associated with one of the input frame and the prediction error. A quantization parameter may be generated by multiplying a reference quantization parameter by a normalization value of the computed activity value. In another example method, an input frame including an I frame may be received and motion prediction for the I frame may be performed based at least in part on information extracted from one or more previous input frames. In a further example, the adaptive quantization controller may perform the above-described example methods.

Abstract: A hierarchical motion estimator and a motion vector generating method for compressing image data, having both a high frequency component and a low frequency component, rapidly and correctly compress the image data without increasing memory requirements. The motion estimator includes a first data processing block, a second data processing block and a motion estimation block. The motion vector generating method generates current image hierarchical data, generates reference image hierarchical data and then generates a motion vector based on high-frequency current image hierarchical data, low-frequency current image hierarchical data, high-frequency reference image hierarchical data and low-frequency reference image hierarchical data.

Abstract: A device and method for filtering added information, in which PSI (Program Specification Information) in a transport stream is processed in an MPEG-2 system layer, are provided. The device includes a memory for storing table IDs and version numbers of sections for each of the table IDs, a combination of at least one of the sections forming a table which added information defines; a comparing unit for determining matching of a table ID included in the present section and the table IDs stored in the memory upon reception of the section, and comparing the version number of the matched table ID to the version number of a received section number; and a section processing unit for receiving and processing the present section if it is determined that the version number stored in the table ID is not the same as the version number of the received section, where by reducing a size and complexity of hardware, i.e.

Abstract: A method of controlling an encoding (bit) rate and a method of transmitting video data, and an encoding (bit) rate controller for a video encoder and a video data transmission system employing the methods, wherein the number of bits is allocated to a current picture on the basis of previous encoding results without defining a relation between an encoding rate and the distortion, the limited number of bits is not forced when features of the current picture are different from those of the previous pictures, and a quantizer scale is set adaptively to various features of the current picture without using an additional number of bits corresponding to variation of the quantizer scale, so that it is possible to improve the picture quality of video data to be displayed on a monitor by using such real time variable bit-rate control.